56745945 has 48 divisors (see below), whose sum is σ = 103783680. Its totient is φ = 28626048.

The previous prime is 56745919. The next prime is 56745959. The reversal of 56745945 is 54954765.

56745945 is a `hidden beast` number, since 56 + 7 + 4 + 594 + 5 = 666.

It is not a de Polignac number, because 56745945 - 2¹⁰ = 56744921 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56745945.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112564 + ... + 113066.

It is an arithmetic number, because the mean of its divisors is an integer number (2162160).

Almost surely, 2^56745945 is an apocalyptic number.

It is an amenable number.

56745945 is a deficient number, since it is larger than the sum of its proper divisors (47037735).

56745945 is a wasteful number, since it uses less digits than its factorization.

56745945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 56745945 is about 7532.9904420489. The cubic root of 56745945 is about 384.2774890463.

The spelling of 56745945 in words is "fifty-six million, seven hundred forty-five thousand, nine hundred forty-five".